Plains, Midwest and South Affected by Powerful Storm System

A powerful storm system spawned multiple tornadoes across the central and southern U.S. on Sunday, killing at least 12 people in Arkansas and Oklahoma, authorities said.

In Arkansas, a large tornado roared through the center of the state, touching down around 7 p.m. local time and lashing the cities of Mayflower and Vilonia as it traveled just northeast of Little Rock, the state's capital, according to the National Weather...